Strainer



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T. D. M HALE STRAINER Filed March 19, 1938 oon 0000000000 00 OQOOOOQOOOO 0000 0000 Jan. 2, 1940.

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INVENTOR.

ATTORNEY.

Patented Jan. 2, 1940 2,185,512 I YSTRAINER. Thomas McHale, Los Angeles, Calif. Application March 19 '19ss',-seria.1 No. 196,926

Q #1 Claims. (o1. 210 sy The present invention relates ,to improvements in straining devices" and particularly to devices adapted to straining milk. v I

' Important objects of the invention are to pro vide in a device of the above nature an improved article embracing a structure of. a seamless and streamline character which is ofa more sanitary nature, more easy to cleanse and to be kept clean, and more simple and less expensive to manufacture.

I in devices of this nature interfitting troughs each of which are of a like uniform standard size,

. formed from asingle sheet and free from any laps, joints or weldedseams wherein bacteria of an. injurious nature may lodge, and afterward inake their way into thehuman body.

" A still further object of" the invention resides 1 inthe improved simplified means for more securely' gripping the filter sheets between the assembled troughs and spacingtheparts apart in such a manner that a registered position of the perforations in one strainer withfthe other is unnecessary.

Another important obje'ctis to provide a-pair of strainer members which will interfitin such a manner thata sheet of filtering fabric may besmoo-thly fitted in between. them, without any portion thereof being creasedor folded over upon itself, and also to make" it possibletoyinterpose the filtering sheet and any porous filtering layer which may accompany it, between end, side and, bottom portions of the paired filtering members,

Owing to this feature of the invention, and to other improved features'thereof, all. the milk is strained. there being; no pockets or crevices wherein a residue of milk will be found after a straining operation has been completed,

Only one; die, consisting of, a male and female member, is required in the manufacture of the twoparts-of which the metallic portion of the strainer consists. 'I'heextreme simplicity of the;

device reduces cost of manufactureand also-results in a lighter, more efficient. strainer, easier tohandle and more quick'to assembleand to disassemble, the lightnessand compactness of the device also lessening shipping costs. 4 l I Still another valuable feature'of the invention res'idesyin the provision of a pair of strainer members which are shiftable with relation to each other-after a straining operation has been completed, in such a manner as to efficiently squeeze the residual milk out of the compressible filtering material which is interposed between A further object "of the invention is to provide the invention.

them. 7 Hence an economyis effected by saving milkthat would otherwise be wasted.

In addition to the foregoing objects, itis an f object of the inventionto provide an improved anti-splash member which will efliciently perform not only the function of preventingany portion of an incoming streamof milk from splash-f ing over the top of the strainer, but will also pro tect the layer of porous straining material'from, e

being damaged bythe force of such a stream'of milk. This feature of the invention also. relates to an'anti-sp'lash member which constitutes a new article of manufacture which may bemade and sold separately from the remainingv portion of the'device, to be used in other situations if desired. v

Still other objects, improved features and in -dications of invention will hereinafter appear,

Referring to the accompanying sheet of drawings wherein is shown the device as now reduced to practice and being sold in the trade- Fig. 1 is a plan view of the structure shown in Fig.4.

Fig. 2 is a plan view of the, bottom trough of the strainer shown in Fig. 4.

Fig. 3 is a transverse section taken on line 3-3 of Fig. 4. In Fig.3 the filtei sheet, which was purposely omitted from the view in Fig. 4 in order to disclose details which wouldotherwise" 30 be hidden from View, is shownand the means whereby-the'filter sheet is gripped and at the same time the devices are spaced in relation toeach other is included in the'view.

, Fig. 4 is a side elevation of the two strainers. in assembled relation without the showingo'f the usual filter sheet' therebetween.

Fig. 5 is a plan View of the straining material or milk filter on a reduced scale.

Fig. 6 is a section takenon line fi-6 of Fig.

Fig. '7 is a perspective view separately showing an anti-splash member which forms apart of Referring in detail to the drawing, the metallic "portion of the device comprisesthe upper and inner trough land the lower and outer trough 8, these" two troughmembers being, by preference, and as shown, 'of identical size and sha e except that-the marginal flanged of the lower trough 3 is furnished with spacing lugs Ill which. are upstruck from the metal as shown. .These spacers underlie andall abut against the mar ginal flange l l of the upper trough! and thus hold said two troughs properly spaced apart to receive between them the layer offiltering mat rial 12: J I

By preference and as shown the end walls [5 I and it of the troughs are imperforat e, but their cular, all of the same size and spaced apartfrom each other a distance about equal to their diameter.

Owing to the use of the spacers ll! it does not matter whether or not the perforations of the upper trough aline with those of the lower trough when said two troughs are placed in the superposed relation shown in Fig. 4, but when a strainer of this type is constructed with only a very narrow space between the interfitting mem-,

bers and a single sheet of filtering fabric in such space, care must be taken to aline the upper and lower, individual perforations or the. flow of. the liquid being strained will be too greatly im- Peded.

Any desirable or well known filtering or straining material may be used between the two superposed troughs for straining purposes, but I prefer to use a filtering material l2 shown in. Figs. 5 andfi preferably consisting of cotton batting and underlying it is shown a gauze cloth 25.

- In the manufacture of the device the perfora: tions of the foraminated areas may be formed either before the troughs have been otherwise acted upon. by a die, or the perforations may befo-rrned-by a suitable die structure just before completion of pressing into the shapes shown in the drawing. It is desirable that the formation of said perforations be not left till all the shaping has been done, for if th'a should be the case some roughened surfaces might result. When, however, the shaping and perforating operations are properly performed a smooth streamline contour results in the completed article.

From. Fig. 3 it will be seen that the assembled structure comprises a pair of elo1igated,.troughshaped, sheet metal members, which are of a runcated V -sha-pe in cross-section, and each of which is furnished along the top of each of its sides with a longitudinal substantially horizontal flange, said members'beingidentical as to size and shape except that the flange 9 of the lower member. has in it a plurality of upstrucl; indentations ill which underlie and contact with the flange l i of the upper member and thereby support said upper member in a nested, upwardly spaced relation to its mate.

Owing to the fact that each of the two metallic strainer members has inclined walls both at its sides and at its ends, it is possib'le to put the straining fabric in place without wrinkling or creasing it. Also this: feature, in conjunction with the fact that the spacing bosses iii of the lower strainer member 8' are all of themroutwardlyspaced from the inner edge of the flange 9, permits shifting the inner strainer member 1 first in one direction and then in the opposite direction both longitudinally and transversely to squeeze the milk out of the side portions of the porous material after a straining operation. Also downward pressure uponthe upper strainer member 7 will squeeze out a considerable portion of the milk between the bottom portions of "the two strainer members.

splash member 26, which is shown in place upon the strainer member 7.

shown in the latter view in a position to deliver a stream of milk'upon the angularly corrugated bottom portion 28 of said anti-splash member 2%. Said member 26 has diverging, upwardly dirooted wings 29 each furnished with an out.-

wardly directed flange tins-these flanges being adapted to rest upon theflange N3 of the upper" strainer member l, the dimensions of the wings Hilbeing such as to bringithe bottom of the in-;

serted member 2% up a little above the bottom of These wings may be utilized, if desired, to support the anti-splash member upon the sides of other vessels than} that formed by the strainer troughs'shown, and f otherliquids than. milk may also be kept from splashing by the use of said anti-splash member.

In using this anti spl'ash member on the strainer,"

' structure shown said member may be positioned at any desired point along the length -of the strainer trough i. y

The bottom ithe anti-splash member shown furnished with V-shaped corrugations but other means than the corrugations, having upwardlydirected points, may be used to prevent splashing, without departing from the spirit of the claimed invention.

It'should be understood that the present disclosure: for the purpose of illustration only and that this inventionincludesl all modifications and subject matter claimed.

What is claimed is:

l. A strainer consisting of a pair of elongatedv 3 .4: I -ernii /"alents which fall within. the scope of the;

of which is furnished along the top of each of its: I sides with a. longitudinal, substantially horizonta] flange, said members both being identical as to size and shape except that the aforesaid M flanges. of one ofthern has in it a plurality of upstruckindentations which underlie the flange of the othermember andthereby support said other member of the pair in an upwardly spaced,

nested relation to its mate, both of said members having foraminated portions in a spaced rela-:

tion to each other, and a straining material oc cupying, the

portions, 7 I p 2. A strainer combination consisting, of apair of. seamless, streamline, elongated troughshaped single she'etrnetal members which are of truncated V shape both in longitudinal and transverse mid-section andeach of which is fur. rushed along the top of each of its sides with a longitudinal, substantially, horizontal flange,

s d membersboth being identical astoisize and space between said foraminate d sl .pe except that the aforesaid flanges of one of them'h.ave in them a'pluralityof upstruclc 1 bosses which underlie the flanges of the other, 7 member and thereby support said other member I of the. pair in an upwardl'yspaced, longitudinally and transversely shittably nested relation to its mate, both of said membershaving foraminat ed portionsin a registrable spaced relation to each other, and a. filter layer occupying the space between said fora-min'ated portions," said filter layer comprising a cotton batting provided"with a gauze backing on oneface thereof and the latter iace bein g placed downwardly in the nested re laticn of the combination. i

3. The subject matter of claim 2 and, said filter layer being gripped between said pair. by

said bosses and being compressible to squeeze"- liquid outofit after a straining operation. when one trough is shifted in relation to the other trough.

4. In a strainer structure, a pair of interfitted sheet metal strainer members having perforated bottoms which are in a slightly vertically spaced relation to each other, a layer of porous filtering material filling in the space thus provided,

and an anti-splash member supported within said strainer structure and having a splash preventing bottom portion which is slightly spaced above the bottom of the innermost of said interfitted members. g

' THOS. D. McHALE. 

